Grease-cup



H. J. MURPHY.

GREASE CUP.

APPLlcAnoN FILED MM2?, |919.

Patented 1m30, 1920.

-Sula aio UNITED STATES PATENT OFFICE.

nowann J. MURPHY, or READING, MAssAcHUsnrrs.

GREASE-cur.

. Specification ofLetters llatent.-4 Patented M311'. 30, 1920.`

Application mea may 27,1919. serial No. 300,173.

To all whom it may concern:

Be it known that I, HOWARD J. MURPHY, a citizen of the United States, residing at Reading, inthe county of M1ddlesex and State of Massachusetts, have invented new- .and useful Improvements in Grease-Cups, of

which the following is a specification.

This invention relates to a grease cup -which is attachable to a carryin 4part requiring lubrication, and is provi edI at one end-with a grease inlet, and at its opposite end with a grease outlet communicatingv with the surfaces to be lubricated.y

The object of the invention is to provide a grease cup, the grease inlet of which is normally closed by an inwardly displaceable spring-pressed valve, adapted to be dis-V placed by a part of a grease gun, the cupl being provided with an element of greasegun-advancing means causing the displacement of the valve by a grease un of appropriate construction, and wit a ymember operable by the advancement of the gun to displace a valve controlling the discharge of Vgrease from the gun.

The invention is embodied in the irnprovements which I will now proceed to describe and claim. l

,Of the accompanying drawings forming a part of this specication,-

Figure 1 is a side view of a grease cup i embodyingthe invention, connected with a carr ing art lubricated'b the cup.

2 ils) an end view ofthe cup. Fig. 3 is a section on line 3-3 of Fig. 2. Fig. .4 is a side view of a grease gun adapted to coperate with the cup.

Fig. 5 is a longitudinal section of aportion of the grease gun.

Fig. 6 is a sectional view showing the engaged with, and communicating with the cup to force greaseinto the cup.

The same reference characters indicate the same parts in all of the figures.

12 represents a grease cup having a grease inlet13 at its outer end, the opposite en'd of the cup beingl attachable to a carrying artA and provided with a grease outlet 14, w "ch is preferably formed in a threaded nippleI 15, adapted to be'l screwed into a tappedv socket m a carrying part 16 to be lubricated. The carrying part as here shownis a bolt adapted to be inserted in a socket formed inan end of a vehicle springhand provided with a grease duct 17 communicatmg with the periphery of' the bolt. It is obvious, however, that the carrying part *may be otherwise constructed. v

The grease inlet 13Y is circular and its margin 1s formed as a valve seat. 4

-18 represents an inwardly displaceable valve within the cup, adapted to close the i-nlet 13, the valve and the seat formed by the. inlet being preferably tapered, as shown by Fig. 3.

The valve is adapted to' be displaced inwardly into the cup, Aand is normally closed against its seat by a spring 19, asshown by Fig. 3. n

The valve 18 is displaceable by a grease gun nozzle 20, and the cup is provided with a cylindrical external surface adapted t guide and permit the rotation of the 4grease gun. On said external surface is an element of means for. advancing the grease gun in such manner as to cause the nozzle 2O to displace the valve, as indicated by Fig. 6.

The greasegun nozzle' is formed to enter the grease inlet 13, and is provided with outlet ports 21 which are normally closed by a valve 22 held yieldinglyinthe position shown by Fig. 5, by a spring 23. The said element as shown here, is embodied in a.r

pair of oppositely projecting and oppositely inclined lugs 24, projecting from opposite. sides ofthe cup and formed to cooperate with helical slots 26 formed in a tubular extension 27 of the grease gun barrel 28, the arrangement being such that when the grease un, is moved endwise to engage its slots with the lugs 24, and then endvvise relatively to the fixed ,cu

position shown by Fig. 6, the nozz e 20 being'thus caused to dis lace the valve 18, and

enter the cup, so that lts ports 21 are within the cup. The un is now adapted to be operated by a vancing its piston 29v by means of the screw-threaded piston-rod 30,

, given a partial rotation, the gun is advanced tothe Said to bear on a washer 32 covering the annular outer end of the valve 22. v

It will now be seen that the cupv is adapted to engage a portion ofthe grease gun, and

to cooperate with said portion in causing an endwise advancement of the gun when the 'latter is rotated, the advancement of the gun causing the simultaneous displacement of the cup valve. 18 and of the nozzle valve 22. The greasegun constructed as described will form the subject of another application. A backward rotation of the grease gun causes vits disengagement from the cup and permits the closing of the cup valve 18 by its spring 19, and the closing of the Anozzle valve 22 by its spring 23. y

The cup valve18 and the end member 31 have flat outer surfaces which are flushA with each other when the valve is closed, so that said surfaces may be ,simultaneously wiped to remove dirt therefrom before the gun is engaged with the c up.

rlhe cup valvev is providedwith spaced a'part ears 34, the outer ends of which are in sliding contact with the inner surface of the cup to guide the valve 18, and prevent it from moving edgewise when removed from its seat. The force of the spring 19 should be sufficient to enable it t0 close the valve upon its seat against the resistance offered by grease left by the gun between the valve and the seat.` rl`he ears 34 are formed to be forced by the spring 19 through an accumulation of grease in the cup.

It is obvious that the lubricating material may be relatively hard grease, or a fluid oil, the described construction being particularly adapted for use with the grease.

rlhe lugs 24 constitute the equivalent of quick pitch male screw threads adapted to coperate, in advancing a grease gun, with the equivalent' of female screwthreads formed by helical slots 26 inv a part of the gun, the arrangement being such that a partial rotation of the grease gun on .its longitudinal axis imparts an endwise movement 0f sufficient amplitude to the gun. One lug 24 and .one slot 26 may be employed-instead of two. I claim:

1. A grease cup having a grease inlet at its outer endformed as a valve seat, the opposite end of the cup being attachable to a carrying part, and provided with a 'grease outlet, an inwardl displaceable valve With- 1n the cup forme to closely it said seat, a

y valve closing s ring within the cup, the cup valve bein displaceable by a grease gun nozzle, and: the cup being rovid'ed with a grease gun-guiding externai) surface having an element of grease-gun engaging and adwithin the cup its outer end, formed as a valve seat, the opposite end offtlie cup being attachable to a carrying part, and provided with a grease outlet, an inwardly. displaceable valve formed to closely fit said seat,

a valve closing spring within the cup, the

cup valve being gun nozzle, and the cup being provided with a grease gun-guiding external surface having outwardly Iprojecting oppositely inclined lugs adapted to cooperate with helical grooves in a grease gun extension, to advance a grease gun, and cause the opening of the cup valve by a part of tlie gun, and With an annular end member surrounding the v alve vseat and operable by the advancement of the grease gun to displace a nozzle-closing valve on the gun.

3. A grease cup substantially as specified by claim 1, the cup valve being provided with spaced apart guiding ears in sliding contact with the inner surface of the cup, and formed to' be forced by said spring through an accumulationy of grease in the cu v lll). A grease cup having a grease inlet at its outer end, formed asa-valve seat, thefopposite end of the cup being attachable to a carrying part, and provided with agrease outlet, an inwardly displacea'ble valve within the cup adapted tov close said inlet, a valve-closing springwithin the cup, the .cup valve being displaceable by a grease gun nozzle, and the cup being provided on its external surface with a quick thread screw element adapted to coperate with a complemental element on a grease gun. in displacing the cup valve.

5. A, grease cup-attachable to a carrying part and having a grease gun-guiding eX- ternal surface, and an element of means on said surfacefor engaging and advancing a grease gun guided thereby, the outer end of the cup being provided with means coperalting with said engaging vand advancing means in displacing a valve'in a grease gun advanced upon the cup, .and with a grease inlet formed as a valve seat and adapted to receive a grease gun nozzle, the cup being provided internally with a springclosed valve, adapted to fit said seat and to be displaced by an advancing grease-gun nozzle.

' In testimony whereof I have laffixed my signature. HOWARD J. MURPHY.

displaceable by a grease 

